Re: InitializeMagick ISSUE
Bob Friesenhahn <[email protected]>
| Newsgroups | gmane.comp.video.graphicsmagick.help |
|---|---|
| Message-ID | <[email protected]> |
On Wed, 9 Mar 2016, Damiano Fabiani wrote: > Hello everyone,I'm new with GraphicsMagick and Magick++. > > I was doing simple performance tests to verify the conversion speed from BMP format to PNG, JPEG and TIFF > formats. Here is the code for BMP to PNG conversion and is similar for BMP to JPEG and BMP to TIFF: Since you say you are using ImageMagick 6.9.3-Q16, this is an ImageMagick issue. You should address it on the ImageMagick lists/forums. You are of course welcome to use GraphicsMagick instead. The Magick++ API offered by ImageMagick is rather similar to the one offered by GraphicsMagick since they originate from me and have not diverged much. > The first time I forgot to call InitializeMagick, but the program runned anyway and I experimented about 19 ms > conversion time from a 800x400 bmp to png; from bmp to jpeg I experimented about 7 ms and for bmp to tiff 1 ms. > Then I correctly initialized the library by calling InitializeMagick and I runned the test another time. Now I'm > experimenting about 130 ms conversion time for bmp to png, while performance seems to be the same for the other > two conversions. > > This behaviour is very strange. Why this loss of performance only with PNG? Am I missing something or am I doing > something wrong? This does indeed seem very strange. Bob -- Bob Friesenhahn [email protected], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140